Electromagnetic governor.



PATENTED APR. 24, 1906.

D. BACON. ELECTROMAGNETIC GOVERNOR.

APPLICATION FILED APR.17, 1905.

wafl k $331 5% 61m iv i (1109 a W UNITED STATES PATENT fission.

Specification of Letters Patent.

Patented A ril 24, 1906.

Application flied Apri117,1905. Serial No. 266,898.

To all whom it may concern:

Be it known that I, DANIEL Bacon, a citizen of the United States, and a resident of Brooklyn borou h, New York city, and State of New York, %1ave invented certain new and useful Improvements in Electromagnetic Governors, of which the following is a specification.

The object of m invention is to provide a device by means 0 which the action of a governor in controlling the movements of a valve or gate or other mechanism requiring automatic control is communicated by means of electroma netism, so that the delays and dangers usua ly attending the overcoming of weight, friction, and other mechanical resistance are done away with and .the action of the governor is thereby rendered more certain and instantaneous.

In the accompanying drawing I have shown device as applied to the stem of a steamvalve for engines; but it is to be understood that it is equally ap licable to other kinds of valves, gates, an devices generally in which a rotary, rocking, or vibratory movement is employed to increase or diminish the amount of power which is permitted to reach the operating mechanism which the governor is designed to control.

A is the top of the valve-casing, and the valve-stem a is extended sufliciently to receive the valve-operating mechanism. This stem is screw-threaded, and motion in one direction closes the valve, while motion in the other direction opens the valve.

B G are electric motors mounted loosely upon the valve-stem a and driven continuously in opposite directions by a current from the battery I) 0, respectively. The motors are provided with the usual collector-rings d 6, provided with the brushes f g h i, and the circuits are always closed during the operation of the device. Both motors therefore are constantly running and ready to perform work whenever required. Each motoris provided with an armature D E, respectively,

I which revolves with it and carries an electromagnet F G, respectively. These magnets are normally idle or quiescent, simply turn.- ing freely with their respective motors around the shaft a. Fixed or splined to the shaft (1, and preferably between the two ma nets, is the armature H, which is adapte to be picked up by whichever magnet 1s energized and caused to rotate with it, thereby turning the shaft 0. in the same direction as the magnet which picks it 11 Each magnet-armature is provided with a collector-ring 9' 7c, respectively, with the brushes lm n 0, which are connected by suitable wiring to the respective batteries 0 I) through the circuit-closer I,

which is automatically operated by a governor J.

The governor J is attached to-some moving part (not shown) of the engine or other mechanism (not shown) the operation of which is to be controlled or governed. The mechanical operation of the governor therefore is the usual one; but the rising and falling of the balls of the governor under variations of speed of the operating mechanism are utilized to make contact at the circuit-closer I, and thereby close the circuit which ener izes the magnet G or that which energizes t e magnet F, according to whether the speed of the governor is getting too high or too low. To accomplish this result, I provide a-contactfinger p, secured to the governor-block g and forming a part of both ma et-circuits. The play of this finger is such that when the block g uses to such point as may be selected as representing the highest speed desired the finger p'comes in contact with the upper finger 1' of the circuit-closer I. Thereby it serves not only as a stop but to close the circuit through the wires to '21) through the magnet G and the battery Z. The shaft is thereby at once picked up by said magnet G and to I turned to close the valve, and thereby diminhould the speed of the governor fall below the point selected for the minimum speed of the operating mechanism, the finger p comes against the lower contact-point s of the circuit-closer I, and thereby closes the circuit through the wires y y battery 0, and electromagnet F, which picks u the armature H, an thereby turns the va v -ster'n a to open the valve and let on more power. Assoon as the s eed of the governor increases enough to lift t e finger away from the contact-stop s the circuit is roken and the valve becomes stationary in its new position.

The contact-stops 1' s are made adjustable and minimum speeds, as may be required by the various machinery to which the governor is applied. l

I chtnn- An electromagnetic governor which consists of a governing device adapted to move ate speed corresponding to that of the apperatus to be governed, a circuit-closer adapted to be operated by said governing device upon reaching a predetermined point of high or low speed, on electromagnetlc device mount- .ed upon the controlling-stem of the apparetus to be governed; an adapted to turn said stem'ineither direction as may be required to increase or diminish the speed of said a paratus, and means, substantially as descri ed, whereby an electric current is directed into said electroma netic device in one or the other-direction by the action of said governing device in contacting with said circuitcloser.

\ DANIEL BACON. 

